Garmin G300 for Cessna SkyCatcher Pilot's Manual page 188

Additional Features
The FPM may be used to identify a possible conflict with the aircraft flight path
and distant terrain or obstacles. Displayed terrain or obstacles in the aircraft's
flight path extending above the FPM could indicate a potential conflict, even
before a terrain alert is issued. However, decisions regarding terrain and/or
obstacle avoidance should not be made using only the FPM.
Activating and deactivating the flight path marker:
1) From the full-screen PFD and/or split-screen PFD Page, press the
MENU Key.
2) Move the FMS Joystick to highlight the 'Flight Path Marker' field.
3) Turn the FMS Joystick to highlight 'On' or 'Off'.
Flight
Path
Marker
Wind
Vector
170
Flight Path Marker (PFD or PFD Page)
Garmin G300 Pilot's Guide
Airport
Runway
190-00921-00 Rev. E